10. Evan Williams

 Founder of Blogger and Twitter

Blogger, one of the first web applications for creating and managing weblogs. Williams invented the term "blogger" and was instrumental in the popularization of the term "blog".

Twitter, a popular, free social networking and micro-blogging service. Twitter itself became a whole new company 2007, with Williams as co-founder, board member and investor.  Compete.com ranked Twitter as the third most-used social network as nd it marked 55 million monthly visits. 2010, Twitter has 105,779,710 registered users and it also boasts of getting. It gets 300,000 new users a day. and receives 180 million unique visitors a month.

11. Robert Johnson

 Founder of Black Entertainment Television (BET)

In 2001, Johnson became the first African American billionaire, and the first black person to be listed on any of Forbes world's rich list. With net worth of US$550 million.Black Entertainment Television, the first cable television network aimed at African Americans . It was launched in January 1980, initially broadcasting for two hours a week. In 1991, BET became the first black-controlled company listed on the New York Stock Exchange. As of 2007, BET reaches more than 65 million U.S. homes and expanded into other BET-related television channels that make up the BET Networks: BETJ, and digital cable channels BET Hip-Hop and BET Gospel.

In 2003, BET was no longer a black owned business when Viacom s bought BET for $3 billion. Johnson's 63% stake made him worth over a billion dollars after taxes, making him the richest black person in the United States until surrendering the title to Oprah Winfrey.

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